Granted Patent
Utility
US 5,215,220 · App. 07/693,795
Tamper evident closure with dispensing spout and integral opening member
Inventors:
Walter J. Kreiseder, Allen J. Vogel
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Apr 30, 1991
Inventors
Walter J. Kreiseder
Allen J. Vogel
Assignee (at issue)
Courtesy Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.